Trzeba kamienia comes from Twierdza, the Polish release of the medieval strategy game Stronghold, first launched in 2001 by Firefly Studios. In play, resource warnings tell the lord what the castle economy lacks, and stone is vital for walls and towers. Polish players remember the localized announcer lines from hours of campaign and multiplayer matches, and clips of them later circulated on soundboards and in gaming edits. The line stays popular because it mixes nostalgia with a universally clear meaning, needing one more resource.